The Z80 eventually became the most popular microcomputer family as it was used in millions of embedded devices as well as in many home computers and computers using the de facto standard CP/M operating system, such as the Osborne, Kaypro, and TRS-80 models.
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Mostek cut a deal with a startup, Zilog, in which Mostek provided fab resources to manufacture the Zilog microprocessors in return for second sourcing rights to the Zilog family.